Welcome

Hell yes - get trading standards on them if you must.

**Proving the fault **
Under the Regulations where a fault occurs with goods within 6 months, starting on the date you took delivery, and you request a repair or replacement, or if that fails, a full or partial refund, then you do not have to prove that the fault exists. The trader must prove that the goods were not faulty in disputed cases. After 6 months has lapsed, you will have to prove that goods are faulty, for example by obtaining an experts report. (see "'Using an Expert'" )

http://www.tradingstandards.gov.uk/wirral/support/support1.htm